Cut into small slices ciabatta. Cut the liver and small cubes. Slice the peeled onions, tomatoes and mushrooms thick enough rings (if large - cut into halves or quarters). Wash and dry the sage leaves and lettuce Lollo rosso, out onto a plate. Strung ciabatta, liver, tomatoes, onions and mushrooms on skewers, alternating with each other, grease, salt and pepper and fry on the grill, turning, feeding, laying out on a salad.